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Measurement of the transverse target and beam-target asymmetries in $\eta$ meson photoproduction at MAMI
- Source :
- PRL 113, 102001 (2014)
- Publication Year :
- 2014
-
Abstract
- We present new data for the transverse target asymmetry T and the very first data for the beam-target asymmetry F in the $\vec \gamma \vec p\to\eta p$ reaction up to a center-of-mass energy of W=1.9 GeV. The data were obtained with the Crystal-Ball/TAPS detector setup at the Glasgow tagged photon facility of the Mainz Microtron MAMI. All existing model predictions fail to reproduce the new data indicating a significant impact on our understanding of the underlying dynamics of $\eta$ meson photoproduction. The peculiar nodal structure observed in existing T data close to threshold is not confirmed.<br />Comment: 5 pages, 3 figures, accepted for publication in PRL
- Subjects :
- Nuclear Experiment
High Energy Physics - Experiment
Nuclear Theory
Subjects
Details
- Database :
- arXiv
- Journal :
- PRL 113, 102001 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1408.3274
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.113.102001